202/04/26 · Sigma-Aldrich Online Catalog Product List: Headspace Vials, Flat Top, Round Bottom Product # Description Add to Cart SU860030 Headspace vial, flat top, flat bottom volume 20 mL, clear glass vial, O.D. × H × I.D. 22.5 mm × 75. china 9mm 9-425 chromatography vials for sale